green



March 15, 1927. 1,621,161

A. GREEN REFRIGERATING APPARATUS Filed April 50, 1926 s Sheets-Sheet 3 FIG. 5.

4s 40 52 as Patented Mar. 15, 1927.

., UNITED STATES ARTHUR GREEN, F COVENTRY, ENGLAND.

REFRIGERATING APPARATUS.

Application filed April 30, 1926, Serial No. 105,852, and in Great Britain July 4, 1925.

This invention relates to refrigerating apparatus in which a fluid after evaporation is transferred by a compressor to a high pressure system which incorporates a condensing element or device cooled by an air current derived from a driven fan.

In refrigerating apparatus of this kind it is desirable that the fan should be driven at a higher speed than the compressor in order that the eflicient working of both may be obtained, and it has been hitherto proposed to mount a fan on a shaft driven directly by an electric motor and to couple the shaft with a compressor shaft by means of reduction gearing.

The primary object of the present invention is to provide a refrigerating apparatus of this type wherein the shafts and operating parts are mounted in an improved manner within enclosing casings or casting members,

these members being mounted one upon the other in such a manner that the whole apparatus is rendered as compact as possible, and at the same time its assembly is facilitated and the correct alignment and relative positioning of the shafts is ensured in a simple and economical manner.

By this means it will be seen that the necessity for mounting the individual elements of the apparatus, such as the electric motor, the fan, the reduction gearing, and the compressor, on a base plate, and the requirement for taking precaution to see that these elements are correctly aligned and located one relatively to the other is obviated, as the facings of the casings or cast members which are mounted one upon the other can be readily formed so that the correct positioning and alignment of the parts is automatically ensured as they are assembled, thus enabling the parts to be readily and easily assembled by unskilled workmen.

. A further particular object of the present invention is to provide for the eilicient housing of the reduction gearing in such a manner that it can be depended on to operate effectively without attention for long period, and to this end. the gearing is enclosed within a chamber or casing which serves to isolate it from the air stream produced by the fan, thereby ensuring that the lubricating agent applied to the gear wheels and hearings will not become dust laden or dried up by reason of a constant stream of air passing over it.

A further particular object of the invention is to reduce the number of separate castings required for forming the dilferent chambers or hollow compartments for enclosing the various working parts of the apparatus, and to this end the castings are partitioned or divided so that they serve a dual purpose, it being understood that effective means are provided for access to the working parts and separating them for renewal or inspection.

Referring to the drawings Figure l is a sectional view in side elevation showing one form of the apparatus.

Figure 2 is a section on line 2-2 of Figure 1.

Figure 3 is a section on line 33 of Figurg 1.

Figure 4 is a sectional View in side elevation showing another form of the apparatus.

Figure 5 is a sectional View on line 5-5 of Figure 4;.

Figure 6 is a plan View of the arrangement shown in Figure 4.

'In both the forms illustrated the gear casing 10 is formed from a casting having a side 11, which is open and flanged, secured directly to a facing on a plate or disc-like portion 12 of a casting which forms the major part or eccentric chamber of a compressor 14.

The operating spindle of the compressor extends into the gear casing through a stufling box 21 located in the plate 12, and the end of the spindle 20 engages a bearing 22 formed in the closed side 23 of the casing 10. On the side 22 of the gear casing 10 is directly mounted the open end or side of a casing 25 which is formed with a partition 26 dividing it into two chambers 27 and 28. The chamber 28, of which only a portion is shown on the drawings, forms a housing for an electric motor of any suitable form. The armature spindle 30 of the electric motor, or an extension thereof, passes through the chamber 27 and into the gear casing 10 through a bearing 31 mounted in the side 23 of the casing. A fan 32 is disposed within the chamber 27 and mounted on the spindle 30, and within the casing 10 are a pair of intermeshing gear wheels, the smaller wheel 35 being mounted on the spindle 30, and the larger wheel 36 being mounted on the spindle.

The compressor 14 is enclosed within a cover 40 which engages with a facing formed on the side of the plate 12 opposite to the gear casing, The space between the cover and the compressor forms a reservoir for compressed fluid, the compressor being ar ranged to discharge intothis space.

The lower part of the cover 40 is formed with a pocket a1 which serves as a sump and has at one end a valve 42 controlling the discharge of condensed fluid to a low pressure or evaporating system, of any suitable form, which has a return connection at 43 with the eccentric chamber of the compressor.

A condenser element formed by a pair of headers 45, which are connected'by a plurality of coiled tubes 46. is disposed so as tobe cooled by the current of air generated by the fan 32. The upper of the two headers is connected by an out-flow pipe 47 with the upper part of the cover 0 at 48, and the lower header is. connected with the sump al at 49 by. a return flow pipe 50.

In the form of construction shownin Figures 1, 2 and 3. the tubes 46 are coiled around the periphery of the cylindrical fan chamber 27, and the air is discharged through large openings formed in the periphery. The air may be drawn in the fan through the electric motor and through openings provided in the partition 26.

In the construction shown in Figures 4, 5 and 6, the air is drawn in by the fan throughthe openings 55, and it is discharged laterally through the open end or side of the casing 25. L0 is formed with a part, circular recess of gradually increasing depth into which the fan discharges the air. and at the deep end of the recess 60 there is formed a passage 61 which extends through the casing and opens out at the top, where there is mounted a-ffiared casing 62 of pressed sheet metal which surrounds the condenser element.

What I claim then is 1. In a. refrigerating apparatus, the combination of a disc like casting having a compressor mounted on one side thereof, a compressor shaft extending throughsaid casting to the other side thereof, a gear casing mounted on the said other side of said casting, a partitioned casing mounted on the gear casing, the partition dividing the casing into a motor chamber and a fan chamber, an electric motor in the motor chamber, a motor shaft extending into the fan chamber and into the gear casing, a fan in, the fan chamber mounted on the motor shaft, said fan chamber having an inlet and discharge openings, reduction gearing in the gear casing connecting the motor shaft withthe compressor shaft, a condenser for receiving compressed fluid from the compressor and disposed in the; path of the air current inducedby the fan, and means for releasing condensed fluid to a low pressure system associated with the compressor inlet.

The side 23 of the gear casing 2. In a refrigerating apparatus, the combination ofa disc like casting having a com-- pressor mounted on one side thereof, a com pressor shaft extending through said casting to the other side thereof, a gear casing mounted on the said other side of said casting, a fan casing mounted on the gear casing, a driven shaft extending from the fan cas' ing into the gear casing, a fan in the fan casing and mounted on the driven shaft, said fan casing having inlet and discharge openings disposed for inducing anair current externally of the gear casing,reduction gearing connecting the driven shaft with"the compressor shaft and shielded from the air current by the gear casing, a condenser for receiving compressed fiuid from the compressor and disposed in the path of the air current induced by the fan, and means for releasing condensed fluid to a low. pressure system associated with the compressor inlet;

3. In a refrigerating apparatus,the combination of a disc-like casting having a compressor mounted on one side thereof, a compressor shaft extending throughsaid casting to the other side thereof, a gear casing: mounted on the said other side of said" cast ing, a partitioned casing mounted" on the gear casing, the partition dividing the easing into a motor chamber andia fanchambenan electric motor in themotor chamber, a motor shaft extending into the fan chamber and? into the gear casing, a fan in the, fan cham-- ber mounted on the motor shaft, said fan chamber having inlet and discharge. open ings disposed for inducing an air currentexternally of the gear casing, reduction gearing connecting the motor shaft with the compressor shaft and shielded from the air current by the gear casing, a condenser for receiving compressed fluid from the compressor and disposedin the path of the air; current induced by the fan, andlmeans for releasing condensed fluid to, a lowpressure system associated withthe compressor inlet. 4. In a refrigerating apparatus theconr bination of a disc-like casting having a c o in pressor mounted on one side thereofj,ac o m;- pressor shaft extending through said; casting. to the other side thereof, a hollow casting mounted on said other side of theother disclike casting, said hollow casting being; formed with a gear chamber andfwitli a: through passage isolated from said gear chamber, a fan casing mounted onsaidlholflow casting, a fan mountedlon a drivenshaft within the fan casing,,said faircasingandi gear cha'mber'being isolated one froirrthe other by a wall, said driven, shaft extend.- ing through said wall into the gear chamber, said fan casing having inlet and outlet ports one of which registers withone endfof, the through passage, a condenser disposed; adjjacent; the other end of thethrough passage. and associated with the compressor outlet,

reduction gearing within the gear chamber connecting the driven shaft with the com-- pressor shaft, and means for releasing condensed fluid to a low pressure system associated with the compressor inlet.

5. In a refrigerating apparatus, the combination of a disc-like casting having a compressor mounted on one side thereof, a compressor shaft extending through said casting to the other side thereof, a hollow casting mounted on said other side of the disc-like casting, said hollow casting being formed with a gear chamber and with a through passage isolated from said gear chamber, a partitioned casing mounted on the hollow easing, the partition dividing said easing into a motor chamber and a fan chamber, an electric motor in the motor chamber, and a motor shaft extending into the fan chamber and into the gear chamber, a fan in the fan chamber mounted on the motor shaft, said fan chamber having inlet and outlet ports one of which registers with one end of a through passage in the hollow casting, a condenser disposed adjacent the other end of the through passage and associated with the compressor outlet, reduction gearing within the gear chamber connecting the motor shaft with the compressor shaft, and means for releasing condensed fluid to a low pressure system associated with the compressor inlet.

6. In a refrigerating apparatus, the combination of a disc-like casting having a com pressor mounted on one side thereof, a compressor shaft extending through said casting to the other side thereof, a hollow casting mounted on said other side of the disc-like casting, said hollow casting being formed with a gear chamber and with a through passage isolated from said gear chamber, a fan casing mounted on said hollow casting, a fan mounted on a driven shaft within the fan casing, said fan casing and gear chamber being isolated one from the other by a wall, said driven shaft extending through said wall into the gear chamber, said fan casing having inlet and outlet ports one of which registers with one end of the through passage, a pressed metal casing of flared form mounted on the other end of the through passage, a multitube condenser mounted within said flared casing, said condenser being associated with the compressor outlet, and means for releasing condensed fluid to a low pressure system associated with the compressor inlet.

7. In a refrigerating apparatus, the combination of a gear casing, a compressor and a reservoir for compressed fluid mounted on one side of the gear casing, the operating shaft of the compressor extending into the gear casing and forming the low speed element thereof, a two chambered casing mounted directly upon the other side of the gear casing, a shaft in said casing extending through into the gear casing and forming the high speed element thereof, a fan on said shaft mounted in the chamber adjacent the gear casing, an electric motor located in the other chamber and having its armature mounted on said shaft, peripheral openings formed in the fan chamber for allowing the in-flow of air, an opening in the end of the fan chamber disposed adjacent to the gear casing, a passage for the discharge of air formed integrally with the gear casing and having one end registering with said opening in the end of the fan chamber, a condenser casing associated with the other end of said passage, a pair of headers within the condenser casing having pipe connections, one with the upper part of the reservoir for compressed fluid, and the other with the sump, a plurality of coiled tubes connecting the two headers and forming a con- GGIISQI element within the condenser casing, means for driving the shafts, and means for releasing condensed fluid to an evaporating unit in communication with the inlet of the COIIIPI'BSSOT.

8. In a refrigerating apparatus, the combination of a gear casing; a compressor and a reservoir for compressed fluid mounted on one side of the gear casing; the operating shaft of the compressor extending into the gear casing and forming the low speed element thereof; a two chambered casing mounted directly upon the other side of the gear casing; a shaft in said casing extending through into the gear casing and forming the high speed element thereof; a fan on said shaft mounted in the chamber adjacentthe gear casing; an electric motor located in the other chamber and having its armature mounted on said shaft; peripheral openings formed in the fan chamber for allowing the in-flow of air; an opening in the end of the fan chamber disposed adjacent to the gear casing; a passage for the discharge of air formed integrally with the gear casing and having one end registering with said opening in the end of the fan chamber; a condenser casing associated with the other end of said passage; a pair of headers within the condenser casing having pipe connections, one with the upper part of the reservoir for compressed fluid, and the other with the sump; a plurality of coiled tubes connecting the two headers and forming a condenser element within the condenser casing; means for driving the shafts; and means for releasing condensed fluid to an evaporating unit in communication with the inlet of the compressor.

In witness whereof I affix my signature.

ARTHUR GREEN. 

